Using a array to SendMessage to call a function don't work, why?

Questions & Answers
1

Hey Guys,

I need to call a function with two arguments via SendMessage. I recently found out that I have to do it by using a array because SendMessage can only send One Value… So I stored my two values into a array, But the transmission still doesn’t work.

Error Message:
Failed to call function SetVelocityZ of class PlayerMotor
Calling function SetVelocityZ with 1 parameter but the function requires 2.

Here is a snippet of the sending script(JS):

function FixedUpdate () 
{
var arrayStoreage = new Array ();
arrayStoreage.length = 2;
arrayStoreage[0] = controllerNumber;
arrayStoreage[1] = velocityZ;
	
if(isGrounded == true)
{
		GameObject.Find("Player").SendMessage("SetVelocityZ", arrayStoreage);
}


}

And here is the receiving script (JS):

private var velocityZfromLeft : float;
private var velocityZfromRight : float;
 
function SetVelocityZ(controllerNumber : int, velocityInput : float)
{
	if(controllerNumber == 0)
	velocityZfromLeft = velocityInput;
	print("Left works");
	
	if(controllerNumber == 1)
	velocityZfromRight = velocityInput; 
	print("Right works");
}

The array seams to work, maybe I have to change something in my function… Any Ideas??

2

SetVelocityZ should declare and use the argument as Array, like this:

function SetVelocityZ(parms: Array){
{
    if(parms[0] == 0){
      velocityZfromLeft = parms[1];
      print("Left works");
    } 
    if(parms[0] == 1){
      velocityZfromRight = parms[1]; 
      print("Right works");
    }
}

NOTE: You should avoid calling Find functions at Update or FixedUpdate - declare a member variable and assign the object to it at Start:

var player: GameObject; // declare this variable outside any function

function Start(){
   player = GameObject.Find("Player");
}

function FixedUpdate(){
   ...
  if(isGrounded == true)
  {
       player.SendMessage("SetVelocityZ", arrayStoreage);
  }
  ...

Better yet, you could save a reference to the player script at Start, and call SetVelocityZ directly with the two original parameters (replace PlayerScriptName below with the actual player script name):

var playerScript: PlayerScriptName; // use the actual player script name as the variable type 

function Start(){
  playerScript = GameObject.Find("Player").GetComponent(PlayerScriptName);
}

function FixedUpdate () 
{
  if(isGrounded == true)
  {
       playerScript.SetVelocityZ(controllerNumber, velocityZ);
  }
}

The receiving script would be your original version:

private var velocityZfromLeft : float;
private var velocityZfromRight : float;
 
function SetVelocityZ(controllerNumber : int, velocityInput : float)
{
    if(controllerNumber == 0)
    velocityZfromLeft = velocityInput;
    print("Left works");
 
    if(controllerNumber == 1)
    velocityZfromRight = velocityInput; 
    print("Right works");
}